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  #1  
Old 06-28-2010, 08:36 PM
Gold Bird Gold Bird is offline
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Default 12V to coil?

Well, I thought the voltage was a full 12v to the coil but I tested it tonight and at idle it reads 10.5 to 11volts. Once you rev the engine it goes to 12.1 to 12.5. Must still have the resisitor wire in there? Where do I go next with this?
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Old 06-29-2010, 02:58 PM
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Forgot to mention in the post that a few weeks ago I put in a Pertonix electronic module in the distributor and got a new Pertronix coil. I think they are supposed to have full battery voltage......
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Old 06-29-2010, 07:44 PM
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I,m thinking you are getin 12 volts. If you still have the generator on the car. I think you would be getting around 0.6 or so with the resister wire. Just my thought. Yo dave?????? Yo gary??????????
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Old 06-29-2010, 07:57 PM
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Do you have the system wired through the IGN SW?

Is it still a generator?
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Old 06-29-2010, 08:40 PM
Gold Bird Gold Bird is offline
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it is wired through the original ign switch but how would I know if its the orig generator? Sorry for the dumb question..
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Old 06-29-2010, 11:42 PM
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Default 12V to coil?

Hi Tom. It is not a dumb question. The question he asked was if you were still running a generator on Gold Bird. Or are you running an alternator now? That is how I understood it.
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Old 06-30-2010, 01:32 AM
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10.5 to 11 volts is enough - according to what I remember of the Petronix site.
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Old 06-30-2010, 05:29 AM
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Quote:
Originally Posted by scumdog View Post

10.5 to 11 volts is enough - according to what I remember of the Petronix site.
Most likely correct.

I asked if you had a generator as the output may be low. The PERTRONIX system is designed to work off full BAT VOLT which is ideally about 14.6V. This may be difficult to arrive at with a GEN.

But the VOLT you showed seems to be low also. Maybe check the output of the GEN and how much of that is actually getting to the BAT. The volt reg is mechanical and may need to be adjusted (see shop manual).

Ideally, this system should be supplied through a relay (to realize full benefit). The IGN SW signal activates the relay and it draws directly from the BAT.

Are you having ignition performance problems or are just concerned with low BAT VOLT?
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Old 06-30-2010, 12:23 PM
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Quote:
Originally Posted by tbirds8 View Post
I,m thinking you are getin 12 volts...
I agree. I would bet, when Tom's car is sitting (not started) the battery reads, 12-volts. Then when he starts it and idles, the generator isn't charging because its running too slow, so the battery goes down to 11.5-volts.

My understanding from my buddies (because I don't use Pertronic's) is, these electronics systems use a lot more juice than the points setup. They work far better with an alternator, just because an alternator outputs plenty of voltage at idle speeds.

I am told, the MSD system draws well over ten amps, but it adds new life to your engine.

Tom, what is your concern regarding performance? Can you tell a big difference when your car voltage drops below 12-volts? Does the engine 'miss' and run erratic?

Measure your battery as it sits (not running for a few hours). If you read under 12-volts, have the battery checked for a dead cell. The Pertronix system depends on a good battery. - Dave
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Old 06-30-2010, 03:50 PM
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Default 12V to coil?

BTW... It was Gold Bird Tom, Jr. who asked the original question, after putting in a Pertronix system in Gold Bird.
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